UWB CPW fed 4-port connected ground MIMO antenna for sub-millimeter-wave 5G applications

Amit Patel, Arpan Desai, Issa Elfergani*, Alpesh Vala, Hiren Mewada, Keyur Mahant, Sagar Patel, Chemseddine Zebiri, Jonathan Rodriguez, Esraa Ali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
38 Downloads (Pure)


This paper embodies the design and development of a compact Coplanar Waveguide (CPW) fed connected ground Multiple- Input-Multiple-Output (MIMO) antennas operating in the sub-millimeter-wave 5G New Radio (NR) n257/n258/n261 bands. The planar geometry leads to a small and compact structure while achieving a wide operating bandwidth, high gain, and better radiation efficiency. The top surface of the antenna comprises a modified CPW in the form of two circular structures that feeds the centrally slotted circular patch. The single antenna structure is arranged in a rotational orthogonal manner forming a 4-port structure. The ground plane on the bottom of a 4-port structure is connected using a circular ring which is carefully optimized for achieving isolation levels>20 dB across the band of interest. The sub-mm-wave resonating 4-port antenna achieves a compact size of 24 × 24 mm2, a wide bandwidth of 24.8–44.45 GHz (79.35%), the maximum gain of 8.6dBi, and minimum efficiency of 85% across the bands of interest. The proposed antenna element is fabricated over Rogers 5880 substrate and experimental tests are carried out, where a good correlation between the scattering parameters, transmission parameters, gain, and MIMO diversity performance is achieved that makes the antenna a potential candidate for its application in sub-millimeter wave 5G applications.

Original languageEnglish
Pages (from-to)6645-6658
Number of pages14
JournalAlexandria Engineering Journal
Issue number9
Early online date18 Dec 2021
Publication statusPublished - 1 Sept 2022
Externally publishedYes


  • CPW
  • Defected Microstrip Structure (DMS)
  • MIMO
  • MIMO Diversity
  • mm-wave 5G
  • Ultra-Wide-band (UWB)


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